Effect of Triangular Microgrooves on Drag Reduction in Rectangular Pipe Flow

Li, Entian; Liu, Yang; Yao, Pei; Xiang, Haiyan; Guo, Lianghui; Li, Wen

doi:10.1615/jflowvisimageproc.2019028998

Cited by 3 publications

(1 citation statement)

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“…These characteristics of natural organisms provide inspiration for researchers to explore drag reduction technology, which forms a unique DR discipline: biomimetic DR. Although the basic idea of DR is inspired by biology, combined with a more detailed principle of DR, biomimetic DR can be subdivided into three categories: (1) The superwetting surface drag reduction; , (2) The flexible wall for turbulent drag reduction; and (3) The biomimetic microgroove drag reduction. , Although biomimetic surface engineering has been introduced into the relevant fields of the petroleum industry, such as pipeline inner surface, , anticorrosion , and so on, its combination with the petroleum industry is still in the initial stage, and the case that it can be directly put into the commercial crude oil pipeline has not been reported. At present, researchers are mainly focusing on the mechanism and effect of biomimetic technology on oil flow DR in the laboratory.…”

Section: Drag Reduction With Biomimetic Surfacementioning

confidence: 99%

Drag Reduction Related to Boundary Layer Control in Transportation of Heavy Crude Oil by Pipeline: A Review

Jing,

Guo,

Karimov

et al. 2023

Ind. Eng. Chem. Res.

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With the depletion of conventional light crude oil, heavy crude oil will occupy an increasing share of the energy structure in the 21st century. Heavy crude oil is characterized by an API gravity of 10 to 22.3 or a viscosity of 0.09 to 10 Pa·s. The flow of heavy crude oil in the pipeline is laminar in the higher viscosity range and turbulent in the lower viscosity range, and its flow resistance comes from the viscous force between the oil and the wall or the additional stress of turbulent flow. Hence, pipeline transportation of heavy crude oil is faced with a huge loss of frictional resistance, which means a reduction of the transportation efficiency. To decrease pump power consumption, improving the transportation efficiency of heavy crude oil pipelines is a key factor. In recent years, some biomimetic technologies that reduce the flow resistance of viscous oils have made new progress in improving their fluidity and have not yet been put into use in commercial pipelines. Therefore, it is important and appropriate to discuss the breakthrough achievements and progress made by researchers in the drag reduction (DR) of heavy crude oil and to summarize its advantages, disadvantages, and potential problems. This review discusses boundary layer control methods for heavy crude oil drag reduction. First, conventional DR technologies, such as polymers, surfactants, fiber suspensions, oil–water core annular flow (CAF) and oil–aqueous foam CAF, and potential DR technologies, including oleophobic surfaces, flexible walls, biomimetic microgrooves, and ferrofluid annular DR under magnetic confinement, are presented. Second, the mechanism of DR is investigated and summarized; the highlights and progress of the technology are reviewed, and new ideas to improve the existing DR technology are proposed. Finally, the challenges and prospects of DR are presented.

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